The House Judiciary Committee scheduled a May 21 appearance by former White House counsel Don McGahn, setting up a possible contempt vote if he doesn’t show up.

President Trump has indicated he does not want McGahn to testify or turn over documents requested by the Democrat-led panel, citing through lawyer William Burck, “significant Executive Branch confidential interests and Executive privilege.”

But Judiciary Committee Chairman Jerrold Nadler, D-N.Y., said McGahn must secure a court order excusing him from appearing or face a contempt of Congress charge if he doesn’t appear.